Improvement in windows



J. PERKINS.

Windows.

No. 138,579, Patented May 6,1873.

izy z 12 ";42.

gttnm AM. mom ill/(MIMFH/C an M! (osaanws mocsss) UNITED STATES PATENTOFFICE.-

JOS HUA PERKINS, OF DANIELSONVILLE, CONNECTICUT.

IMPROVEMENT IN WENDOWS.

Specification forming part of Letters Patent No. 138,579, dated May 6,1873 application filed October 19, 1872.

To all whom it may concern:

Be it known that I, JOSHUA PERKINS, of Danielsonville, in the county ofWindham and State of Connecticut, have invented a new and Improved\Vindow-Vent-ilator, of which the following is a specification:

My invention consists of one or more of the panes of a window made intwo parts, and one or both of the said parts arranged in suitableguide-ways for sliding along the other part for opening a space for thepassage of air for ventilation.

Figure 1 is a front elevation of a windowsash containing only one paneof glass, which is arranged according to my invention; and Fig. 2 is asection of Fig. 1 taken on the line as 00.

Similar letters of reference indicate corresponding parts.

A and B represent the two parts of the pane of glass, which are dividedtransversely at or about the middle and arranged to lap each otherslightly. The part A is permanently fixed in the sash, but the. part Bis arranged in guide-ways 0 so as to slide up and down alongside of thepart A for opening the space below. A thumb-piece, D, is attached to thepart B for convenience in operating it. The upper partinay be made toslide, if preferred, and the lower part stationary; or both parts mayslide. Any approved arrangement ofguide-ways may be used.

The pane may be divided vertically and the movable parts arranged toslide horizontally, if preferred.

One or more panes of a window will be arranged in this way, aspreferred. Probably the best arrangement would be to have one at the topandanother at the bottom.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- A window-pane consisting of two parts, A B, one orboth arranged in guide-ways to open and close, and provided with athumb-piece for actuating them, substantially as specified.

JOSHUA PERKINS. \Vitnesses: T. B. MOSHER,

ALEX. F. ROBERTS.

